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arXiv:1702.02778 · Nature Photonics

Electron spin polarization in strong-field ionization of xenon atoms

Alexander Hartung, Felipe Morales, M. Kunitski, K. Henrichs, Alina Laucke, Martin Richter, T. Jahnke, Anton Kalinin, Markus S Schöffler, Lothar Ph. H. Schmidt, Misha Ivanov, Olga V. Smirnova, R. Dörner

Published Jun 13, 2016• 134 citations
arXivHTMLPDF
DOI
10.1038/nphoton.2016.109

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We propose a scheme to produce spatially and temporally controlled spin-polarized photoelectrons by strong-field ionization of atoms. We calculate the momentum-resolved electron spin polarization from two spin-orbit coupled ionic states (J=1/2J=1/2J=1/2 and J=3/2J=3/2J=3/2) of krypton atoms in orthogonal two-color laser fields using the strong-field approximation, and obtain the instantaneous spin-polarization degree. With this scheme, the spin-up and -down photoelectrons can be well separated in the space, and the spin polarization is controlled on the sub-laser-cycle timescale. This study illustrates and reveals the mechanism of the generation of spin-polarized photoelectrons with an arbitrary spatially and temporally tailored laser field. We expect this work has implications for controlling the spatiotemporal spin polarization in strong-field physics.